0.040 moles de nitrito de sodio (NaNO2) en 200 mL de una solución de ácido nitroso) 0.10 M (HNO2, Ka = 5.1 x 10-4).

the correct answer would be b. amelia, because the particals of gas move really fast (charged particals) and gas also has a lot of room (particals move independently) so the only answer that has both of those is amelia's.